Glyph fetching for the current controller & Steam Input support.

[ILOVEPIE]

I'm working on a application for the steam deck and was wondering if there was any plan to support the steam input APIs for fetching controller glyphs and maybe support for steam input itself, this is critical for my application as I need to be able to fetch correct glyphs for whatever controller is connected (including the built-in one) when in game mode on the deck.